Felling attachment for sewing-machines



(No Model.)

J. W. BETZ. TELLING ATTACHMENT FOR SEWING MACHINES.

No. 520,292. Patented May 22, 1894.

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/N VENTOH WITNESSES UNITED STATES PATENT OFFICE.

JOSEPH W. BETZ, OF BROOKLYN, NEW YORK.

FELLING ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent N0. 520,292, dated May 22,1894.

Application filed April 22, 1893. Serial No. 471,377. (No model.)

To 60% whom it may concern.-

Be it known that I, JOSEPH W. BETZ, of Brooklyn, in the county of Kingsand State of New York, have invented anew and useful Improved FellingAttachment for Sewing- Machines, of which the following is a full,clear, and exact description.

The object of this invention is to produce a novel, simple andinexpensive device for attachment upon a sewing machine, which willafford means to fell seams so as to produce a welt finish therefor, in asuperior manner, and that is adapted to do perfect work on curvedportions of a garment with facility and ease of manipulation.

To this end, myinvention consists in the peculiar construction of thefelling device, as is hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a perspective view of the improvement, in position on asewing machine bed-plate. Fig. 2 is an enlarged broken end view of theimproved device on a sewing machine bed-plate, the latter appearing insection and its feed block in full lines, and fibrous material engagedwith the attachment at a seam, showing the initial step in theproduction of a welt finish for the seam. Fig. 3 is an enlarged brokenplan view of the device. Fig. 4 is aside View of the device opposite thearrow 4, in Fig. 3, a portion of the sewing machine bed-plate appearingin section, and part of the feed block of the machine in full lines.Fig. 5 is atransverse sectional view, on the line 5-5 in Fig. 3. Fig. 6represents the edge of two pieces of fibrous fabric, and method offorming a joining seam thereon, which is to be felled; and Fig. 7 is anedge view of the fabric portions seamed together, and finished with awelt that has been produced with the improvement.

An arm A, is provided, having a proper length to adapt it to have asecured engagement with the bed-plate B, of a sewing machine, and locatethe scroll head 0, that is the feature of the invention, near the feedblock D, said arm being longitudinally slotted near the end that is tobe clamped upon the bed-plate, for the introduction of a set screw a, ofordinary form, that has a threaded engagement with the bed-plate whenthe device is secured thereon, as shown in Fig. 1.

The scroll-head C, is constructed of a single piece of sheet metal bentinto scroll form, having the lip flange 1), formed on it by projeotingan edge portion of the sheet metal laterally beyond the scrolledportion. The scroll-head O, is made coniform, the larger end portionbeing farthest removed-from the needle bar B, of the sewing machine,thereby affording an entering throat for goods that is to pass throughthe scroll head.

The material forming the head 0, is bent to curl the same from the topside of the arm A and return the edge 0 inwardly, and locate it at aboutan equal distance from the curved inner surface of the head, indifferent directions radially considered, this feature of constructionbeing essential to adapt the device for its use. The head 0, istransversely affixed to the arm A, at an angle to its edges which ispreferably less than ninety degrees with regard to the edge of the armthat is nearest to the outer edge of the bed-plate B, when the device issecured thereto.

An important feature of the device consists in the formation of alongitudinal slot e, in the side of the scroll-head C, from its smallend above the lip flange b. The scroll-head C, when in proper positionfor service, presses upon the bed-plate B, directly forward of thepresser foot B and lies above and near to the serrated feed block D, ifsuch a feeding device is a part of the sewing machine.

When a seam that joins two pieces of cloth such as G, is to be felled,for the production of a welt finish on the exposed side of the garmentthat the cloth is a portion of, said seam is produced as represented inFig. 6, by sewing the lapped edges of the cloth together on an ordinarysewing machine, or by hand, there being one edge portion g made widerthan the other edge 9, to afiord material from which to form the welt.The cloth G is now laid upon the bed-plate B, with the seam flaps incontact with this part of the sewing machine, and at one edge of thegoods the. end of the wider seam flap g, is entered within the largestend of the scroll-head C, as shown in Fig. 2, the flap being curled overthe free edge e, by the sliding movement of the goods .ICO

toward the presser foot B under which it passes. The gradual contractionof the coniform scroll-head 0, causes the seam flap g to be more closelyfolded so as to turn its outer edge in and nearly in contact'with theedge of the other flap of the seam, as shown in Fig. 7; this dispositionof parts being effected at the point of exit for the material at thesmall end of the scroll-head. By provision of the slot e, the free edgeof the seam flap g, is permitted to pass laterally out of thescroll-head, and extend toward the edge of the narrow seam'flap gthereby insuring a neat welt of uniform width, if the wider flap g is ofequal breadth throughout its length.

As before mentioned, the cloth that is to be welt finished at the seam,is imposed with the seam flaps g, g, downwardly, the press'er foot Bresting on the upper face of the goods, whereby the feed block D, hasthe contact of its serrated face with the wide seam flap g, enforced bythe pressure of said foot. The machine being put in motion, causes theneedle to sew the folded seam flap g along its folded edge upon thecloth G, through which the needle passes to penetrate said folded edge.

The peculiar construction of the improved scroll-head C, permits thefeed block or other feeding 'device of a sewing machine, to have directcontact with the seam flap which is to form the welt, so that if thegoods is cut bias, or the seam is curved, as on the inner and outerseams of a garment sleeve, the fullness of the seam flap at its freeedge will be properly gathered in as the work progresses, and a neatwelt finish result, which cannot be produced by any mechanical devicewhich will not permit such a contact of the feeding device with the seamflap, or in other words, allow the wide flap of the welt to enter thescroll from one side and curl around the free edge 0, as shown in Fig.2, while the garment or material whereon the welt is being produced,moves over the top surface of the feller device.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- A felling attachment for sewing machines,provided with a scroll head whose lower edge has an essentiallyhorizontal, outwardly projecting lip spaced from the inner end of thescroll to form a passage way for a piece of fabric to enter the headbetween the lip and the scroll proper, the said head being provided, inits curved portion and above the said passage way, with a longitudinalslot, arranged on the same side on which the said lip proj ects topermit another piece of fabric to enter the scroll head above the saidpassage way, substantially as and for the purpose set forth.

JOSEPH W. BETZ. Witnesses:

CHAS. J. SCHRIEFER, PHILIP POST, J r.

